Blindstitching-machine for felling.



APPLICATION FILED APR. 9. l9l4.

Patented Mar. 19, 1918 6 SHEETS-SHEET 1- mu 5 4 g 8 g N 5- mm WiTnesses.

XMTWM M T. J. HAYES.

BLINDSTITCHING MACHINE FOR FELLING.

APPLICATION FILED APR. 9, 914.

Patented Mar. 19, 1918.

6 SHEETSSHEET 2.

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VYiTnes s e;M

T. J. HAYES.

BLINDSTITCHING MACHINE FOR FELLING.

APPLICATION FILED APR. 9 1914.

Patented Mar. 19, 1918.

5 SHEETS-SHEET 3- Witnessgz .s .w 8 .1. e A. nW M NH? w w mm M .m lw

T. J. HAYES.

BLINDSTI'TCHING MACHINE FOR FELLlNE APPLLCATION FILED APR. 9. 1914.

1,26%1 93. I Patented Mar. 19, 1918.

6 SHEETSSHEET 5- WiInesses. Inventor.

f. M M Thomas J. Hayes,

' YMWfiW T. J. HAYES.

BLINDSTITCHING MACHINE FOR FELLING.

APPLICATION FILED APR. 9. 1914.

Patented Mar. 19, 1918.

6 SHEETS-SHEET 6.

Fig.5.

Fig.14.

lnvenior. Thomusd. Hayes,

Witnesses. 5

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llhll FATE? FFEQEQ THOMAS J. HAYES, 0F ROSLINDALE, MASSPLCHUSETTS,A$SIGNGR 'IO ABBETTEB FELL- ING- MACHINE COMPANY, OF BOSTON,MASSACHUSETTS, A CORPORATION OF MAINE.

BLINDSTITCHING-MACHINE FOR FELLING.

Application filed. April 9, 1914.

T 0 all 'lC/LOHZ it may concern.

lie it known. that l, THOMAS J. HAYES, a citizen of the United States,and resident of lloslindale, county of Suifolk, State of Massachusetts,have invented an Improvement in Blind"itching-l dachines for Felling, ofwhich the following description, in the accompanying drawing,

conrection with is a specification, like characters on the drawingrepresenting like parts.

This invei'ition i lates to improvements in sewing machines or blindstitching for fellin and for pad! g work and is especially applicable tomachines of the Arbetter type in which the stitch forming mechanismcomprises a curved oscillating needle and means for relatively movingthe needle and the work laterally to p luce two parallel lines ofstitches. one in the base layer of the fabric and the other in thesuperimposed layer.

in order to simplify bllG stitch forming uiechanisn'i and to provide aready and accessible means for adjusting the same and assembling andalso to give the machine a wider scope of operation it has been founddesirable to support the needle carrying mechanism from a pivot in theupper por tion of the head of the machine so that the same may beoscillated around said pivotal support in the shogging of the needle toform the parallel rows of stitching. By forming the link connecting thepivotal bearing to the needle carrier in two relatively adjustable partsthe entire needle mechanism may be adjusted toward and from the presserfoot so that the needle may be positioned accurately in respect theretowithout the necessity for the careful 1nachine work which would berequired if the needle supporting means were without adjustment, ano oneof the objects of the invention has been to produce suitable pivotalneedle supporting means to accomplish this result.

Another object of the invention is to provide a swinging hook bracket topermit the work to be removed from its normal position in the machinefor the purpose of re placing the bobbin in the hook.

Another object of theini ention is to provide a bender mechanism for thebase layer of the fabric in which the bender will be retainedpractically stationary at its extreme upward position a sullicientlength of Specification of Letters Patent. Patentsgd E131, is, 1918.

Serial No. 830,788.

time to permit the needle to enter well into the bent up p rtion of thefabric, and will then be rapidly withdrawn from its up wardly projectedposition to permit the free forwarc movement of the feeding mechanismand of the work carried thereby.

Another object of the invention is to provide means for convenientlyadjusting the bender, operable from the top or the side of the baseplate.

Other objects of the invention will more fully appear from the followingdescription and drawing and will be particularly pointed out in theannexed claims.

In the drawings:

Figure 1 is. a vertical longitudinal sectional view of the standard armand head of a sewing machine embodying a preferred form of my invention,the bed plate and certain portions of the stitch forming mechanism beingshown in elevation,

Fig. 2 is a horizontal sectional view of the axial plane of the mainshaft, the shaft and mechanisms operated thereby being shown inelevation,

Fig. 3 is a with the cover stitch forming said head,

Fig. 4 is a view of the opposite or rear end of the sewing machine aportion of the standard and arm being broken away to show the means foradjusting the feeding mechanism,

Fig. 5 is a detail view of the hook carrying bracket, showing the mannerin which it is supported upon the countershaft which drives the hook,

Fig. 6 is a side elevation in detail of the needle supporting andoperating mechanism,

Fig. 7 is a front elevation of the same,

Fig. 8 is a detail plan view of the bender mechanism,

Fig. 9 is a detail front view of the same,

Fig. 10 is an enlarged detail end view of the bender mechanism showingthe cams for actuating and for adjusting the same,

Fig. 11 is a detail view of a specially designed cam for actuating thebender,

Fig. 12 is a detail side elevat1on of the presser foot mechanism showingthe relative position of the curved oscillating needle thereto and themeans for supporting the presser foot on the hook bracket,

front elevation of the head plate removed to dlsclose the mechanismcontained within Fig. 13 is a front elevation of the same showing alsothe relation thereto of the upper feed dog,

Fig. 14 is a plan view of the same showing the oscillating needle in theposition in which it penetrates the superimposed layer at its forwardend with a suitable cam 12 of fabric in felling, and

Fig. 15 is a similar view showing the relative position of the needleand presser foot when the needle has penetrated the base layer of thefabric.

A preferred embodiment of my invention is illustrated herein asincorporated in substantially the usual form of sewing machine framecreasing having a base plate 1 provided with the usual work support 2 atits front end and at its rear end with a hollow standard 3 suitablysecured thereto and rising therefrom and provided with a hollow arm 4the axis of which is parallel to the plane of the bed plate and whichterminates in the usual head 5 which contains the needle actuatingmechanism and the mechanism for operating the hook.

The arm a is provided at its rear end, its middle portion, and adjacentto the head with bosses 6, 7, and 3 which contain alined bearings forthe main shaft 9. The shaft 9 is provided at its rear end with the usualdriving pulley 10 and hand wheel 11 and for operating the oscillatingneedle, the intermediate portion of the shaft being provided withsuitable cams'and gears to actuate the complemental stitch formingmechanism, the take-up, feed mechanism, and the bender, as willhereinafter be described.

The head 5 of the machine ma} be provided near its upper end with a pairof inwardly projecting bosses 13, 14 forming supports for a shaftlfiadapted to support" the needle mechanism so that the same may bevibrated upon said shaft to form the parallel rows of stitches infelling or padding work. The shaft 15 is located in the vertical planeof the direction of feed of the goods so that the vibrating needle, informing the parallelrows of stitches, will penetrate the goods at equaldistances on either side of said vertical plane. The shaft 15 maydesirably be provided with a collar 16 adjustably secured thereon bymeans of a set screw to provide for the accurate positioning of thesleeve 17 which supports the needle carrying mechanism. In order toprovide for the accurate adjustment of the sleeve 17 it is founddesirable to mount the end of the shaft 15 within a sleeve 18 havingsuitable milled head 19 said sleeve passing through the boss 14 andabutting against the face of the sleeve 17 so thatany wear may be takenup and the needle supporting a downwardly extending integral arm 20supports the oscillating needle, suitable-adjusting screws 22, 23passing through slots in the arm 20 and seated in the member 21, beingprovided to connect the arm 20 to the member 21 so that the entireneedle mechanism may be readily adjusted vertically in respect totheplane of the presser foot or needle plate. Thispermits the accurateassembling of the parts without the careful machine work which otherwisewould be necessary to" position the needle properly in respect to thepresser foot plate and complemental stitch forming mechanism.

The member 21 which is illustrated herein is offset to avoid the end ofthe main shaft and its lower end is so disposed as to come immediatelybeneath the axis of the shaft 15. It is also offset laterally inorder tobring the lower portion thereof into the proper plane in relation to thework plate. The lower portion of the head 5 is slotted and is desirablyprovided with wear plates 24-, 25 adapted to engage oppositely disposedwear plates 26, 27 carried by the needle supporting member 21 and toguide said member in its oscillation to form the parallel rows ofstitches. The member 21 is provided at its lower portion with ahead.having lateral extensions 28, 29 to support the mechanism foroscillating the needle.

These extensions 28, 29 are desirably disposed at an angle to the planeof the bed plate as illustrated in Figs. 1 and 7. The lower extension 29is desirably bifurcated to form bearings 30, 31 for the shaft 32uponwhich the oscillating needle bar 33 is pivotally mounted. The needle baris desirably of a curved or arcuate formJand provided with the usualhead and nose to support a curved needle having a thread groove in itsconvex surface as is usual in machines of this character.

The bearing 30 may be provided with a extension or ear adapted tosupport rigidly a needle guide 3lhaving a recess to receive and directthe oscillating needle.

The needle bar 33 is provided interme diate of its ends with a stud 35by whichit is connected to a link 36 leading toa stud 37 pro ectingfroma cross head 38 slidably mounted upon a preferably cylindrical shaft39 connecting the extensi'ons'28 and 29. The cross head is provided uponits opposite is desirably 'arcuate in form and is provided atapproximately its middle with a universal connection 15 by which it isconnec'ted to the lower end of a link 46 leading to the needle operatingcam 12". i

By reason of the fact that the needle is given a vibrating shogginmovement in ad dition to the oscillation or the needle itself it isnecessary that means be provided whereby the cam 12 will not be bound orinterfered with by the shogging oi the needle. In order to accomplishresult the cam strap a? is split and is provided with an upwardprojection d8 lapted to receive a stud by means of W] .nch it may beattached to bearings 50, 51, in the upper ends of the arms 52 53 of ayoke having a shank 5% adjustablv secured to the link 45 by suit ablemeans such scr ws 55, 56 so that the field of oscillation of the needlemay be varied to cause proper cooperation with the revolving hook'orother complemental stitch forming mechanism.

In the operation of the machine the rotaion of the cam 12 will raise andlower the link 46 thereby rocking the lever l3 about its pivotal stud 14causing the opposite end of said lever to reciprocate the cross head 38througl'i. the hill" ll, and the reciprocation of said cross headserves, through the link 36 to oscillate the curved needle.

By this construction a very rigid relation is always maintained betw theneedle and its supporting mechanism and the wearing of the parts by usecannot materially atlect the accurate movements or the needle.

In order to shog the needle to produce the parallel rows of stitches theneedle carrying mechanism is vibrated about its pivotal shaft 15. Thisis accomplished by means of a link 5'? suitably connected by a balljoint coupling 58 to the needle supporting member 21 and desirablyadjustably connect-ed by a screw and slot connection 59 to an extension60 which is provided with bifurcated end 61 adapted to embrace a cam 62located upon a vertical countershaft 63 suitably driven from the mainshaft 9 by gears 64, 65 having the two to one ratio necessary to producethe proper coordination with the stitch forming mechanism in theparallel lines of stitching.

In order to provide for the adjustment of the amplitude of vibration ofthe needle supporting member 21, means are provided herein for adiustingthe longitudinal movement of the link 57, 60. In order to accomplishthis purpose the link 60 is provided adjacent its rear end with a stud66 forming a pivotal connection f a link 67 which is connected at itsopposite end to the end 68 of one arm of a bell crank lever which ispivoted upon extension projecting downwardly from the boss 7, the otherarm 70 of the bell crank lever is provided with an extension 71projecting; through a slot in the arm 4 and is provided at its end Witha thumb nut 72 adapted to be clamped against the arcuale Walls 73 of theslot.

The adjustment of the arm 71 changes the e position of the pivotalsupport of the ink 67 in respect to the axis of the link 66 therebycausing a greater or less longitudinal movement or" said link as thelink is vibrated laterally by the cam 62.

The mechanism thus described for supporting and actuating the needle isexceedingly simple in character and is found to be very effective. Theradius about which the needle is vibrated in its shogging movement is ofsuch relatively great length that he arc through which the needle movesdoes not vary greatly from a straight line and since the needleoscillates to form the respective stitches in the superimposed and themain layer of the fabric at equal distances from the median line of itsvibration no difficulty is experienced in obtaining the propercoordination with the rcvolvin 'hook.

Another important feature of this inven tion resides in the mechanismfor supporting and for actuating the revolving hook. In the preferredembodiment shown herein the entire hook bracket is pivotally sup portedupon a countersha'ft through which the revolving hook is driven so thatthe hook may be swung laterally from its normal position to permit theinsertion and removal of the bobbin, the construction'also permittingthe hook bracket to be easily removed from the machine.

The forward portion of the arm is provided with bosses 75, 76 formingthe jour nals for a countershaft 77 which extends parallel to the mainshaft 9 and is driven therefrom by a suitable gear 78 carried by themain shaft and which meshes with a gear 79 upon the end of thecountersha'ft 77. At its opposite end the countershaft 77 is providedwith a preferably spiral gear 80 which meshes with a companion gear 81upon the end of a shaft 82 which is provided at its lower end with abeveled gear meshing with a companion gear on the shaft 83 of therevolving hook. (Figs. 1, 2, 8, and 5.)

The shafts 82 and 83 are mounted in the hook bracket 84 which desirablyis of a curved construction such as shown in 3 and is provided at its uper end with a yoke having arms 85 and 86, the arm 86 being de sirablyjournaled upon the sleeve 87 which is mounted in the bearing member 75.The opposite arm is desirably supported upon a removable stud 88 securedto boss 89 projectinpdownwardly from the in cr of the heath the axis ofthe stud 88 in alinement with the axis of the shaft 77. By theconstruction thus described it Will be observed that the yoke ispivotally mounted relati upon an axis coincident with the axis of theshaft 77 so that the entire hook l'iraclret may be swung aside withoutdisconnecting it from the driving mechanism.

In order to maintain the hook bracket normally in position to cooperatewith the oscillating needle I have provided a latch for securing thebracket firmly against the main portion of the head. To accomplish thisand also for other purposes which will hereinafter be pointed out I haveprovided the head of the machine with a segmental plate 90 which maydesirably be secured to the top and bottom thereof by screws 91 and 92.A. latch 93 having an upward projection or lug 9% is desirably securedto the lower part of the segmental plate by suitable screws 95, said lugbeing adapted to engage a shouldered projection 96 carried by a latch 97pivotally secured upon a stud 98 carried by the hook bracket. The latchis normally maintained in engagement with the lug 9 1 by a spring 99which is coiled about a stud 100 on said latch 97 while the opposite endpasses beneath a screw 101 projecting from the plate 90, the end of thespring 99 being desirably curved upwardly to limit the lateral movementof the hook bracket about its pivotal support.

In order to swing aside the hook bracket for the insertion orreplacement of the bobbin it is merely necessary for the operator toraise the end of the latch 97 so that the pro jection 96 will be freefrom engagement with the lug 94 whereupon the hook bracket may be swungsidewise sufficiently to permit the easy insertion and removal of thebobbin. To replace the same it is merely necessary to swing the hookbracket into place, whereupon the latch will automatically reengage withthe lug 9a retaining the same in operative position.

The lower portion of the hook bracket is provided with a shoulderextension 105, (Fig. 12) to receive the end of the presser foot 106 towhich it issecured, desirably by screws 107 and 108 extending throughthe projection 105 into the rear end of upwardly and outwardly disposedside portions 109 and 110 on said presser foot. The presser foot 105 isprovided with forwardly extending toes 111 and 112 on opposite sides ofthe usual throat opening 113, the toe 111 being preferably provided witha slot 11a adapted to receive the upper feed dog'l15 which will behereinafter described. The middle portion of the presser foot is slottedand the outer wall of the slot curved upwardly and laterally to form aledge 116 beneath which the oscillating needle may pass in thereciprocation in which it penetrates the superimposed layer of thefabric and the plane of the remaining portion of the presser foot issufliciently low to permit the lateral movement of the needle withoutinterfering therewith. The position of the presser foot and of theneedle in relation thereto when the needle is penetrating thesuperimposed layer is shown in Figs. 12, and 1a of the drawings herein,and the relative position of the needle and presser foot when the needleis making the stitch in the main layer of the fabric is illustrated inFigs. 13 and 15, it being understood of course that in'the latterinstance the lower layer of material is thrust upwardlyinto the path ofthe oscillating needle by a suit able bender mechanism.

The bender mechanism comprised in this invention is of a novel characterand is adapted to maintain the lower layer of fabric stationary in itsbent up condition a sul'licient length of time for the needle topenetrate well into the fabric, preferably until the point of the needlehas passed across the throat opening in the needle plate thus insuringuniformity of depth of penetration of the fabric and in the length ofstitch. The bender is then quickly withdrawn to a point well beneath thework plate to permit the free forward movement of the feed dog.

The bender mechanism, which is illustrated in its position in themachine in Fig. 3 and in detail in Figs. 8, 9, 10 and 11, comprises acylindrical bender 120 slidably mounted in the work support 2 so thatits end may be raised directly beneath the path of the needle in themovement of the latter to form a stitch in the base layer of the fabric,the upward movement of the bender thereby so presenting the fabric tothe needle as to cause the latter to penetrate and to emerge from theupper surface of the fabric.

In the preferred embodiment of the in rention illustrated herein thebender 120 comprises a cylindrical projection at the upper end of a stem121 which is adjustably secured by a screw 122 in a collar 123 having alaterally extending stud by which it is pivotally connected to the upperend of a link 121, which is pivoted at its lower endupon a stud 125projecting from the end of a substantially horizontal link 126 which isin turn pivoted at its opposite end to a stud 127 projecting from an arm128 of a bell crank adjusting lever. The bell crank lever is pivotedupon its elbow upon a stud or lug 129 projecting from adepending portionof the sewing machine base. The other arm 130 of the bell crank leverpreferably extends upwardly and is forked at its upper end to embrace acam 131 carried upon a suitable short shaft 132 j ournaled in lugs (notshown) extending downwardly from the base plate, the shaft 132 beingprovided with adjusting means such as a milled disk 133, a portion ofwhich projects through the bot tom or side of the machine base at apoint easily accessible to the operator. By r0 tating the milled disk133 and its attached shaft the cam 131 may be caused to rock the bellcrank to. raise andlower the ,end of the arm 128 and consequently toadjust the position of the bender to determine the depth to which theneedle will penetrate the base layer of fabric.

The bender is preferably reciprocated through yieldable connections by aspecial cam which is adapted to give the bender quick rising andlowering movements and to maintain it stationary at the extreme upperand lower positions of its throw through the followinginstrumentalities.

The link 126 which connects the bender to the end of the bell crank armis provided near its middle with a stud or bolt 135 by which it isattached to the offset end 136 of a vertical member 137 which isslidably mounted on a guide 138 depending from a member 140 which issecured to a' stud 141 projecting from the upper arm of the yoke 142which embraces a specially designed cam 143. The yoke 142 is providedwith an extension 144 which is pivoted at its end to a suitable stud 145on the bed plate of the machine.

The member 140 preferably is in the form of a split collar adapted toembrace the stud 141, the ends of the collar being secured together by asuitable screw 146 which may serve to take up wear upon the stud 141.The member 140 preferably is provided with a lateral extension 147 whichsupports a downwardly extending cylindrical guide 148 which is arrangedin parallelism with the guide 138 and passes through a boss 149 in alateral extension of the sliding member 137. A helical spring 150surrounding the guide 148 normally supports the upper end of the boss149 against the end face of the extension 147 of the member 140. Thelower end of the guide 148 is threaded to receive suitable set nuts 151and 152 whereby the tension of the spring 150 may be adjusted to operateproperly upon goods of various character without unduly straining thesame.

The cam 143 as before stated is specially designed so that the highestand lowest portions thereof 00x and y-y are concentric with the axis ofthe shaft upon which it is mounted, thus forming dwells adapted to holdthe bender stationary at the highest and lowest points of its movement.The purpose being as before stated to maintain the bent up portion ofthe fabric stationary during its presentation to the needle.

In operation the rotation of the cam 143 causes the oscillation of theyoke 142 and attached member 140 with its depending guides 138 and 148.This movement of the yoke is transmitted through the member 137 to thelink 126 which being connected to the bender by the link 124 and collarc123 raises and lowers the bender as desired. If the bender encountersany obstaclesuch as a seam in its upward movement the spring 150 willyield in such a manner as to avoid injury to the fabric.

It is desirable that the bender should be maintained in its extremeelevated position during the time required for the needle to enter wellinto the bent up portion of the fabric and then rapidly withdrawn topermit the proper operation of the feeding mechanism. In order toaccomplish this purpose the cam shaft which actuates the bender isdesirably driven at a variable speed during its rotation so that theupward thrust through the, work support will be rapid, the bender thenheld stationary in its extreme upward position, during the dwell of thecam 143, then withdrawn rapidly from the goods and out of the path ofthe advancing feed dog and during the remaining portion of its cyclemoved at a relatively low speed.

In the preferred embodiment of the in vention illustrated in Figs. 8 and9 the cam 143 is mounted upon a suitable shaft 155 suitably supported.in bearings not shown, projecting downwardly from the under surface ofthe bed plate. The shaft 155 is provided with an arm 156 which isconnected to one end of a link 157 the opposite end of which isconnected to the end of a similar arm 158 which extends laterally from ashaft 159 which likewise is mounted in lugs projecting downwardly fromthe underside of the bed plate, the shafts 155 and 158) being arrangedin parallelism but in different planes and having their ends closelyadjacent to one another so that the link 157 which connects the arms 156and 158 will cause a differential relative rotation of the shafts. Theshaft 159 is provided at its end with a beveled gear 160 which mesheswith a corresponding beveled gear 161 upon the end of the verticalcountershaft 63. It will be remembered that the shaft 63 is driventhrough gears 64, from the, main shaft and that these gears have a twoto one relation so that it is obvious that the bender will be raisedupon every second revolution of the main shaft. The mechanism forvibrating or shogging the needle laterally is actuated from the samecountershaft, 63, which actuates the bender and it therefore followsthat a proper coordination between the needle mechanism and the bendermechanism will always be main tained.

It is very important in overseaming work that the base layer of thefabric and the superimposed layer which is being attached thereto beadvanced with absolute uniformity to prevent wrinkling or puckering ofthe superimposed layer. In order to insure this result an upper feed isdesirably prostroke.

videcl which is actuated by the lower or main feed. I have designed anovel form of upper feeding mechanism which is adapted to be used inconnection with the stitch forming mechanism herein disclosed but thesubject matter of this feeding ,mechanism will be made the subject of adivisional ap plication, it will therefore be described briefly in thiscase merely for the purpose of completing the general description of themachine.

The upper feed dog 115 heretofore referred to is adjustably connected byscrews 165, 166, to the lower end of a link 167 which is desirablyoffset in such a manner as to avoid an interference with the end of themain shaft 9 and is connected at its upper end to a stud 168 projectingfrom the elbow of a bell crank lever having diverging arms, the end ofthe lower arm of which is pivoted to the stud 169 extending inwardlyfrom the segmental plate 90 which is attached to the front end of thehead. The other, or upwardly projecting arm 170 of said bell crank leveris pivotally connected to one end of a link 171, the opposite end ofwhich is pivotally connected to a suitable stud projecting laterallyfrom the end of an arm 172 which is secured to a countershaft 173mounted in suitable bosses extending laterally from the side of the headportion and arm of the sewing machine frame. The rear end of thecountershaft 17 3 is provided with a crank arm 17 4 which is suitablypivoted at its free end to one end of a'link 175, the opposite end ofsald link being provided with a cam strap 176 embracing a cam 177suitably secured to the main shaft. In the. operation of the machine therotation of the main shaft causes the reciprocation of the link 175through the cam 177 rocking the eountershaft 17 3 and consequentlyoscillating the link 171 and the bell crank lever so that its elbow 168will be lowered and raised to cause the feed dog to engage the work andto be moved therefrom.

The reciprocation of the upper feed dog is timed to cooperate with themechanism which raises and lowers the under feed dog so that the upperand lower feed dogs will approach each other to clamp the work. Thelower feed dog will thereupon be moved forward to feed the goodscarrying the upper feed dog with it to the end or" its Upon the.downward movement of the lower feed dog the upper feed dog will beraised from engagement with the work and may be restored to its normalposition by means of a spring 178 which may be secured at one end to astud 179 projecting from the link 167 which carries the upper feed dogand at its other end to a pin or stud 180 secured to the inner side ofthe segmental plate 90.

The amplitude of vibration of the lower feed dog may be controlledthrough a bell crank and link adjustment 181, 182connected to a floatinglink 183 having a yoke 184 embracing a cam 185 upon the main shaftadjacent to the rear end of the machine, the link 183 serving tooscillate the shaft 186 which transmits the forward and backwardmovement to the lower feed dog.

The up and down movement may be given to the lower feed dog through anysuitable mechanism but said dog is preferably actuated by a cam 187 onthe main shaft which operates a link laterally from a sleeve whichsurrounds the shaft 186 and which'at its opposite end is connected withtoggle mechanism (not shown) for causing the raising and lowering of thefeed dog.

Inasmuch as this mechanism forms the subject matter of a companionapplication Serial No. 830,790 filed April 9, 1914, itis unnecessary toillustrate it or to describe it in detail.

Any desirable form of take up may be used in connection with themechanism hereinafter described. I have however illustrated a particularform herein in which the entire take-up mechanism except the end of thetake up arm which engages the thread is inclosed within the head and armof the sewing machine. The take-up as illustrated herein comprises abell crank lever the long arm 190 of which is provided with a lateralprojection 191 extending through the side of the machine and having theusual eye for the thread, said bell crank arm 190 being pivoted at'itselbow upon a stud 19:2 projecting from the inner side of the sewingmachinearm the other arm of the take up lever, 193, beingprovided with astud surrounded by an anti friction roller19l ar ranged totravel in acam slot 195 in a sleeve 196 suitably secured to'the' main shaft 9.

It is to be understood that the embodiment of my invention disclosedherein is illustrative merely and is not in any way restrictive and thatmy invention embraces broadly the novel elements and combinations shownor described and particularly pointed out in the following claims.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. In a sewing machine for blind stitching comprising a work support,means for feeding the work across the same, a curved needle pivotallymounted to oscillate in substantially the direction of feed and complemental stitch forming mechanism and means for actuating the same; asupporting member for the needle pivoted upon an axis lyingsubstantially parallel to the direction of feed andmeans for vibratingsaid supporting member laterally to form parallel rows of stitching.

2. In a sewing machine for blind stitching comprising a Work support,means for feeding the Work across the same, a curved needle pivotallymounted to oscillate in substantially the direction of feed andcomplemental stitch forming mechanism and means for actuating the same;a supporting member for said needle pivotally mounted upon the shaft inthe upper portion of the head of the machine, having its axis lyingsubstantially parallel to the direction of feed and means for vibratingsaid supporting member laterally to form parallel lines of stitching.

3. In a sewing machine for blind stitching comprising a Work support,means for feeding the work across the same, a curved oscillating needle,and complemental stitch forming mechanism and means for actuat ing thesame; a shaft mounted in the head of the machine having its axisextending substantially parallel to the direction of feed, a needlesupporting member having a sleeve j ournaled upon said shaft, adjustablemeans for preventing the longitudinal move ment of said sleeve on saidshaft and means for vibrating said needle supporting member laterally toform parallel rows of stitching.

d. In a sewing machine for blind stitching comprising a Work support,means for feeding the Work across the same, a curved oscillating needle,and eomplemental stitc l forming mechanism and means for actuating thesame; a. shaft mounted in the head of the machine having its axisextending substantially parallel to the direction of feed, a needlesupporting member havin sleeve journaled upon said shaft, means ineluding an adjustable bushing surrounding said shaft engaging the end ofsaid sleeve for preventing longitudinal movement of said sleeve on saidshaft and for taking up and means for vibrating said needle supportingmember laterally to form parallel rows of stitching.

5. In a serving machine for blind stitching comprising a Work support,means for feeding the Work across the same, an oscillating needle andcomplemental stitch forming mechanism and means for actuating the same;a supporting member for the needle pivotally nounted in the upperportion of the head of the n achine upon an axis lying substantiallyparallel to the direction of feed, a guidervay for said member in thelower portion of the sewing machine head d \vear plates detachablysecured in said meivay engaging said supporting member \v iez-ehvassembling of the parts and taking is facilitated and means for vibratidneedle supporting member laterally 0 form parallel l'OWS of stitchin ina sewing machine for blind stitcheianprising a Work support and meansfor feeding the Work across the same, a curved oscillating needle andcomplemental stitch forming mechanism and means for actuating tiie same,a member supporting said needle to oscillate in a plane obliquelyinclined to the plane of the Work support, means for pivotallysupporting said member to iermit lateral vibration of the needle wherebythe needle may be cause l to oscillate in differ substantially parallelplanes each of which i substantially parallel to the line of feed andinclined to the Work supporting sur'iace of the Work support to formparallel rovvs of stitching.

7. In a sewing machine for blind stitching comprising a work support,and means for feeding the work across the same, a curved oscillatingneedle and complemental stitch forming mechanism and means for actuatingthe sai s pporting member for said needle PlVOuItll? n'iounted in theupper portion of the g machine head adapted to permit lateral vibrationthereof, means for vibrating said needle laterally and means for varyingthe amplitude of vibration.

8. In se ing machine for blind stitching comprising a work support andmeans for feeding the Work across the same, a curved oscillating needleand comglemcntal stitch forming mechanism and means for ac tuating thesame, a pivoted supporting mem ber for said needle adapted to permitlateral vibration thereof, means for vi rating said needle laterally,means for varying the amplitude of vibration comprising a floating ever,and means for adjusting the position of the fulcrum of said leverrelative to a longitudinal axis thereof.

9. In a sewing machine for blind stitching comprising a Work support andmeans for feeding the Work across the same, a curved oscillating needleand complemental stitch forming mechanism and means for actuating thesame, a supporting member for said needle pivotally mounted in the upperportion of the serving machine head and means for adjusting the same toposition the are of oscillation of the needle toward or from the Worksupporting surface of the Work support and means for vibratsaidsupporting member laterally to form parallel lines of stitching.

10. In a sewing machine for blind stitching comprising a Work supportand means for feeding the Work cross the same, a curved needle pivotallymounted to oscillate in substantia y the direction of feed andcomplemental stitch forming mechanism and means for actuating the same,a supporting member f said needle pivotally mounted in the sevmachine'head upon an axis extending subs tially parallel to thedirection of feed, said needle supporting member being formed in twosections and having adjustable means for securing said sections togetherwhereby the arc of oscillation of the needle may be adjusted toward orfrom the work supporting surface of the work support and means forvibrating said supporting member laterally to form parallel rows ofstitching.

11. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and means for supporting the same including a pivotally supporedlaterally movable member having a depending head, a needle bar )lVOtallyniounted in said head to oscillate in a plane inclined to the plane ofthe work support, means for oscillating said needle bar comprising asliding member carried by said head, means for reciprocating saidsliding member, means for vibrating said supporting member andcomplemental stitch forming mechanism adapted to cooperate with saidneedle.

12. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and means for supporting the same including a pivotally supportedlaterally movable member having a depending head, a needle bar pivotallymounted in said head to oscillate in a plane inclined to the plane ofthe work support, means for oscillating said needle bar comprising asliding member carried by said head, means connecting said slidingmember to said needle bar, a lever connect ing said sliding member tosaid supporting member and actuating means connected to said leverintermediate of its connection to said supporting member and saidsliding member.

13. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and means for supporting the same including a pivotally supportedlaterally movable member having a depending head, a needle bar pivotallymounted in said head to oscillate in a plane inclined to the plane ofthe work support, means for oscillating said needle bar comprising asliding member carried by said head, means connecting said slidingmember to said needle bar, a lever connecting said sliding member tosaid supporting member and actuating means connected to said leverintermediate of its connection to said supporting member and saidsliding member .and means for adjusting the field of oscillation of saidneedle whereby the needle will be caused to cooperate properly with thecomplemental stitch forming mechanism.

14. In a blind stitch sewing machine comprising a work support, meansfor feeding the work across the same, a curved osclllating needle andcomplemental stitch forming mechanism, needle supporting meanscomprising a laterally movable member having a depending head, a needlebar pivotally mounted in said head to oscillate in a plane inclined tothe plane of the work support, means for oscillating said needle bar anda needle guide rigidly supported by said head and partaking of themovements thereof.

15. A sewing machine comprising a work support, an arm having a headoverhanging said work support, a needle and complemental stitch formingmechanism carried by said head, a mainshaft located in said arm, meansoperated by said main-shaft to cause the oscillation of the needle, acountershaft mounted in said head in parallelism with lid mainshaft,means pivotally mounted about the axis of said countershaft forsupporting said complemental stitch forming mechanism, and means drivenfrom said countershaft for actuating said complcmental stitch formingmechanism.

16. A sewing machine comprising a work support, an arm having a headoverhanging said work support, a needle and complemental stitch formingmechanism carried by said head, a mainshaft located in said arm, meansoperated by said mainshaft to cause the oscillation of the needle, acountershaft mounted in said head in parallelism with said mainshaft, ahook bracket pivotally mounted about the axis of said countershaft, arevolving hook carried by said bracket and gearing journaled in saidbracket connecting said hook with said countershaft adapted to cause therotation of said hook and to permit the bracket to be swung about theaxis of the countershaftto provide for the insertion of the bobbin intothe hook or the removal of the bobbin therefrom;

1'7. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and complemental stitch forming mechanism located above the worksupport, means for actuating the same, a bender adapted to present thework in the path of theneedle, a bender actuating cam having a dwelladapted to retain said bender at its highest elevation, and means forproducing a variable movement in the rotation of the said cam wherebythe bender will be quickly withdrawn from its upwardly projectedposition.

18. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and complemental stitch forming mechanism located above thetherefrom, a bender, a bender'a-ctuating cam having a dwell adapted toretain said bender at its highest elevation, a shaft for said cam, adriving shaft disposed adjacent thereto in parallel relation to the camshaft and means for rotating said driving shaft from the main shaft andmeans for imparting a differential rotation to said cam shaft from saiddriving shaft whereby the bender will be rapidly withdrawn from itsupwardly projected position to permit the unobstructed advance of thefeeding mechanism.

19. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and complemental stitch forming mechanism located above the worksupport, means for actuating the same, a bender and means for actuatingthe same comprising a cam having a dwell adapted to retain said benderat its highest elevation, means for producing a variable movement in therotation of said cam comprising two shafts disposed in differentparallel planes and having radially extending arms connected by asuitable link, one of said shafts being connected to said cam and theother to a driving member.

20. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and complemental stitch forming mechanism located above the worksupport, a vertical shaft, means for actuating the same, and meansoperated therefrom to vibrate the needle laterally, a bender and meansfor reciprocating the same comprising a cam having a dwell adapted toretain said bender at its highest elevation, means for producing avariable movement of rotation of the said cam comprising two shaftsdisposed in different parallel planes beneath and longitudinally of thebed plate and having radially extending arms at their adjacent endsconnected by a link, ore of said shafts being connected to said cam andthe other being rotated from the vertical shaft which vibrates theneedle whereby the correct timing of the needle vibration with theactuation of the bender will be insured.

21. In a sewing machine for blind stitching comprising a bed plate, awork support extending through said bed plate, means for feeding thework across the work support, a curved oscillating needle andcomplementary stitch forming mechanism located above the work support, abender reciprocable through said work support, a bender actuating camlocated beneath the bed plate in proximity to the bender, a leverpivotally supported at one end beneath said bed plate and having waysadjacent its free end embracing said am, a bender supporting member andmeans yield-ably connecting said bender supporting member to said lever.

22. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and oomplemental stitch forming mechanism located above the worksupport, a bender, means for supporting and actuating said bendercomprising a cam, a pivoted member having a yoke embracing said cam, ayieldable member carried by said yoke and adjustable means connectingsaid yieldable member to said bender.

23. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and complemental stitch forming mechanism located above the wOrksupport, a bender, means for supporting and actuating said bendercomprising a cam, a pivoted member having a yoke cmbracing said cam, ayieldable member carried by said yoke, means connecting said yieldablemember to said bender and means for vertically adjusting said bendercomprising a lever pivotally mounted on said yieldable member, and meansfor varying the position of said lever.

24. In a sewing machine for blind stitching comprising a work supportand means for feeding the work across the same, a curved oscillatingneedle and complement-all stitch forming mechanism located above thework support, means for actuating the same, a bender, means forsupporting said bender including a bell crank lever, a lever connectingone arm of said bell crank lever to said bender, actuating means forsaid bender connected to said lever intermediate its ends, an adjustingcam engaging the other arm of said bell crank lever, and means forpositioning said cam.

In a sewing machine for blind stitching comprising a work support andmeans for feeding the work across the same, a curved oscillating needleand complemental stitch forming mechanism located above the worksupport, means for actuating the same, a bender, means for supportingsaid bender including a bell crank lever, a lever connect;

ing one arm of said bell crank lever to said bender, actuating means forsaid bender connected to said lever intermediate its ends, an adjustingcam engaging the other arm of said bell crank lever, and a milled diskconnected to said cam having a portion of its surface exposed to permitready adjustment of said adjusting cam.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

THOMAS J. HAYES. lVitnesses:

FREDERICK A. TENNANT, THoMAs J. DRUMMOND.

each, by addressing the commissioner of Batente,

